Java 8 Trampoline for Tail Call Recursion

JavaTrampoline.java

import java.math.BigInteger;

public class TailCallRecursion {

    @FunctionalInterface
    public interface Trampoline<V> {

        V trampoline();

        default V call() {
            Object trampoline = this;
            while (trampoline instanceof Trampoline) {
                trampoline = ((Trampoline) trampoline).trampoline();
            }
            @SuppressWarnings("unchecked")
            V value = (V) trampoline;
            return value;
        }
    }

    public static Trampoline factorial(final int n, final BigInteger accumulated) {
        return () -> {
            if (n <= 1) return accumulated;
            return factorial(n - 1, accumulated.multiply(BigInteger.valueOf(n)));
        };
    }

    public static void main(String[] args) {
        System.out.println(factorial(10000, BigInteger.ONE).call());
    }
    
}